Add another test for anchor error rendering

Author: andrew-stripe

test/schemaValidation.test.ts

@@ -650,11 +650,60 @@ describe('Validation Tests', () => {
       const validator = parseSetup(content);
       validator
         .then(function (result) {
-          console.debug(result);
           assert.equal(result.length, 0);
         })
         .then(done, done);
     });
+
+    it('Anchor reference with a validation error in a sub-object emits the error in the right location', (done) => {
+      languageService.addSchema(SCHEMA_ID, {
+        type: 'object',
+        properties: {
+          src: {},
+          dest: {
+            type: 'object',
+            properties: {
+              outer: {
+                type: 'object',
+                required: ['otherkey'],
+              },
+            },
+          },
+        },
+        required: ['src', 'dest'],
+      });
+      const content = `
+        src: &src
+          outer:
+            akey: avalue
+
+        dest:
+          <<: *src
+      `;
+      const validator = parseSetup(content);
+      validator
+        .then(function (result) {
+          assert.equal(result.length, 1);
+          // The key thing we're checking is *where* the validation error gets reported.
+          // "outer" isn't required to contain "otherkey" inside "src", but it is inside
+          // "dest". Since "outer" doesn't appear inside "dest" because of the alias, we
+          // need to move the error into "src".
+          assert.deepEqual(
+            result[0],
+            createDiagnosticWithData(
+              MissingRequiredPropWarning.replace('{0}', 'otherkey'),
+              2,
+              10,
+              2,
+              15,
+              DiagnosticSeverity.Error,
+              `yaml-schema: file:///${SCHEMA_ID}`,
+              `file:///${SCHEMA_ID}`
+            )
+          );
+        })
+        .then(done, done);
+    });
   });
 
   describe('Custom tag tests', () => {